From patchwork Mon Aug 2 04:00:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pengfei Xu X-Patchwork-Id: 490522 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B1C6C4338F for ; Mon, 2 Aug 2021 04:01:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 21D406054F for ; Mon, 2 Aug 2021 04:01:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230417AbhHBEBI (ORCPT ); Mon, 2 Aug 2021 00:01:08 -0400 Received: from mga17.intel.com ([192.55.52.151]:8832 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229472AbhHBEBH (ORCPT ); Mon, 2 Aug 2021 00:01:07 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10063"; a="193660636" X-IronPort-AV: E=Sophos;i="5.84,287,1620716400"; d="scan'208";a="193660636" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Aug 2021 21:00:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,287,1620716400"; d="scan'208";a="668971395" Received: from fedora29.sh.intel.com ([10.239.182.87]) by fmsmga005.fm.intel.com with ESMTP; 01 Aug 2021 21:00:56 -0700 From: Pengfei Xu To: Shuah Khan , linux-kselftest , linux-kernel Cc: Pengfei Xu , Heng Su , Yu Yu-cheng , Yu Fenghua , Hansen Dave , Luck Tony , Mehta Sohil , Chen Yu C , kernel test robot Subject: [RFC PATCH v2 1/2] selftests/xsave: test basic XSAVE architecture functionality Date: Mon, 2 Aug 2021 12:00:03 +0800 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org The XSAVE feature set supports the saving and restoring of state components, which is used for process context switching. The state components include x87 state for FPU execution environment, SSE state, AVX state and so on. In order to ensure that XSAVE feature works correctly, this case tests and verifies the basic functions of XSAVE/XRSTOR in user space: shows and tests the content change for XSAVE; when the xstate is not changed on the x86 platform, the contents of XRSTOR and XSAVE should be the same. This case is the basis for XSAVE feature testing. Signed-off-by: Pengfei Xu Reported-by: kernel test robot # compile issues during review --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/xsave/.gitignore | 2 + tools/testing/selftests/xsave/Makefile | 6 + tools/testing/selftests/xsave/xsave_common.h | 246 ++++++++++++++++++ .../selftests/xsave/xsave_instruction.c | 83 ++++++ 5 files changed, 338 insertions(+) create mode 100644 tools/testing/selftests/xsave/.gitignore create mode 100644 tools/testing/selftests/xsave/Makefile create mode 100644 tools/testing/selftests/xsave/xsave_common.h create mode 100644 tools/testing/selftests/xsave/xsave_instruction.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index fb010a35d61a..4c0ddb8228e1 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -73,6 +73,7 @@ TARGETS += user TARGETS += vDSO TARGETS += vm TARGETS += x86 +TARGETS += xsave TARGETS += zram #Please keep the TARGETS list alphabetically sorted # Run "make quicktest=1 run_tests" or diff --git a/tools/testing/selftests/xsave/.gitignore b/tools/testing/selftests/xsave/.gitignore new file mode 100644 index 000000000000..00b9970360c4 --- /dev/null +++ b/tools/testing/selftests/xsave/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +xsave_instruction diff --git a/tools/testing/selftests/xsave/Makefile b/tools/testing/selftests/xsave/Makefile new file mode 100644 index 000000000000..dafdb0abdeb3 --- /dev/null +++ b/tools/testing/selftests/xsave/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0-only +CFLAGS := -g -Wall -mxsave -O2 + +TEST_GEN_PROGS := xsave_instruction + +include ../lib.mk diff --git a/tools/testing/selftests/xsave/xsave_common.h b/tools/testing/selftests/xsave/xsave_common.h new file mode 100644 index 000000000000..c555f9d289a3 --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_common.h @@ -0,0 +1,246 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include +#include +#include +#include +#include +#include +#include +#include "../kselftest.h" + +#ifdef __i386__ +#define XSAVE _xsave +#else +#define XSAVE _xsave64 +#endif + +#ifdef __i386__ +#define XRSTOR _xrstor +#else +#define XRSTOR _xrstor64 +#endif + +#define SAVE_MASK 0xffffffffffffffff +#define RESULT_PASS 0 +#define RESULT_FAIL 1 +#define RESULT_ERROR 3 +#define CHANGE 10 +#define NO_CHANGE 11 + +/* Copied from Linux kernel */ +static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, + unsigned int *ecx, unsigned int *edx) +{ + /* ecx is often an input as well as an output. */ + asm volatile("cpuid" + : "=a" (*eax), + "=b" (*ebx), + "=c" (*ecx), + "=d" (*edx) + : "0" (*eax), "2" (*ecx) + : "memory"); +} + +void execution_failed(char *reason) +{ + ksft_test_result_xfail("%s", reason); + ksft_exit_fail(); +} + +int get_xsave_size(void) +{ + unsigned int eax, ebx, ecx, edx; + + eax = 0x0d; + ebx = 0; + ecx = 0; + edx = 0; + native_cpuid(&eax, &ebx, &ecx, &edx); + + return (int)ecx; +} + +void dump_buffer(unsigned char *buf, int size) +{ + int i, j; + + printf("xsave size = %d (%03xh)\n", size, size); + + for (i = 0; i < size; i += 16) { + printf("%04x: ", i); + + for (j = i; ((j < i + 16) && (j < size)); j++) + printf("%02x ", buf[j]); + printf("\n"); + } +} + +void show_part_buf(unsigned char *buf0, unsigned char *buf1, int start, + int size) +{ + int c; + + printf("%04x: ", start); + for (c = start; ((c < start + 16) && (c < size)); c++) + printf("%02x ", buf0[c]); + printf(" -> "); + for (c = start; ((c < start + 16) && (c < size)); c++) + printf("%02x ", buf1[c]); + printf("\n"); +} + +int show_buf_diff(unsigned char *buf0, unsigned char *buf1, int size) +{ + int a, b, result_buf = RESULT_PASS; + + for (a = 0; a < size; a += 16) { + /* SDM "XSAVE Area": XSAVE feature set does not use bytes 511:416 */ + if ((a >= 416) && (a <= 511)) + continue; + + for (b = a; ((b < a + 16) && (b < size)); b++) { + if (buf0[b] != buf1[b]) { + show_part_buf(buf0, buf1, a, size); + result_buf = RESULT_FAIL; + break; + } + } + } + + return result_buf; +} + +int check_xsave_reserved_header(unsigned char *buf0, + unsigned char *buf1, int size, const char *test_name) +{ + int a, b, result_resv_header = RESULT_PASS; + + /* SDM "Form of XRSTOR": Bytes 63:16 of the XSAVE header should 0 */ + for (a = 528; a < 576 ; a += 16) { + for (b = a; ((b < a + 16) && (b < size)); b++) { + if ((buf0[b] != 0) || (buf1[b] != 0)) { + ksft_print_msg("%s FAIL: buf0[%d]:%d or buf1[%d]:%d not 0\n", + test_name, b, buf0[b], b, buf1[b]); + show_part_buf(buf0, buf1, a, size); + result_resv_header = RESULT_FAIL; + break; + } + } + } + + return result_resv_header; +} + +int check_xsave_buf(unsigned char *buf0, unsigned char *buf1, + int size, const char *test_name, int change) +{ + int result_buf = RESULT_ERROR, result_resv_header = RESULT_ERROR; + + switch (change) { + case CHANGE: + if (show_buf_diff(buf0, buf1, size)) + result_buf = RESULT_PASS; + else { + ksft_print_msg("%s FAIL: xsave content was same\n", test_name); + result_buf = RESULT_FAIL; + } + break; + case NO_CHANGE: + if (show_buf_diff(buf0, buf1, size)) { + ksft_print_msg("%s FAIL: xsave content changed\n", test_name); + show_buf_diff(buf0, buf1, size); + result_buf = RESULT_FAIL; + } else + result_buf = RESULT_PASS; + break; + default: + ksft_test_result_error("%s ERROR: invalid change:%d\n", test_name, + change); + break; + } + + result_resv_header = check_xsave_reserved_header(buf0, buf1, size, + test_name); + + return (result_buf || result_resv_header); +} + +void check_result(int result, const char *test_name) +{ + switch (result) { + case RESULT_PASS: + ksft_test_result_pass("%s PASS\n", test_name); + break; + case RESULT_FAIL: + ksft_test_result_fail("%s FAIL\n", test_name); + break; + case RESULT_ERROR: + ksft_test_result_fail("%s ERROR\n", test_name); + break; + default: + ksft_test_result_error("%s ERROR: invalid result:%c\n", + test_name, result); + break; + } +} + +void populate_fpu_regs(void) +{ + uint32_t ui32; + uint64_t ui64; + + ui32 = 1; + ui64 = 0xBAB00500FAB7; + + /* Initialize FPU and push different values onto FPU register stack: */ + asm volatile ("finit"); + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + ui64 += 0x93ABE13; + asm volatile ("fldl %0" : : "m" (ui64)); + ui64 += 0x93; + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + asm volatile ("fldl %0" : : "m" (ui64)); + ui64 -= 0x21; + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + asm volatile ("fldl %0" : : "m" (ui64)); + + /* Fill each remaining YMM register with a different value: */ + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32)); + ui32 = 0xFAFBABAF; + asm volatile ("vbroadcastss %0, %%ymm1" : : "m" (ui32)); + ui32 -= 0xA; + asm volatile ("vbroadcastss %0, %%ymm2" : : "m" (ui32)); + ui32 -= 0xB; + asm volatile ("vbroadcastss %0, %%ymm3" : : "m" (ui32)); + ui32 -= 0x3; + asm volatile ("vbroadcastss %0, %%ymm4" : : "m" (ui32)); + ui32 += 0xA; + asm volatile ("vbroadcastss %0, %%ymm5" : : "m" (ui32)); + ui32 -= 0x7; + asm volatile ("vbroadcastss %0, %%ymm6" : : "m" (ui32)); + ui32 -= 0xABABA; + asm volatile ("vbroadcastss %0, %%ymm7" : : "m" (ui32)); + + #ifndef __i386__ + ui32 += 0xF7; + asm volatile ("vbroadcastss %0, %%ymm8" : : "m" (ui32)); + ui32 -= 0x7; + asm volatile ("vbroadcastss %0, %%ymm9" : : "m" (ui32)); + ui32 += 0x2; + asm volatile ("vbroadcastss %0, %%ymm10" : : "m" (ui32)); + ui32 += 0xD; + asm volatile ("vbroadcastss %0, %%ymm11" : : "m" (ui32)); + ui32 -= 0x4; + asm volatile ("vbroadcastss %0, %%ymm12" : : "m" (ui32)); + ui32 -= 0xDD; + asm volatile ("vbroadcastss %0, %%ymm13" : : "m" (ui32)); + ui32 -= 0xABD; + asm volatile ("vbroadcastss %0, %%ymm14" : : "m" (ui32)); + ui32 += 0xBEBABF456; + asm volatile ("vbroadcastss %0, %%ymm15" : : "m" (ui32)); + #endif +} diff --git a/tools/testing/selftests/xsave/xsave_instruction.c b/tools/testing/selftests/xsave/xsave_instruction.c new file mode 100644 index 000000000000..2b610101511d --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_instruction.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Test kernel support for XSAVE-managed features. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" +#include "xsave_common.h" + +static unsigned char *xsave_buf0, *xsave_buf1; + +static void set_ymm0_reg(uint32_t ui32) +{ + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32)); +} + +static void dump_xsave_content(int xsave_size) +{ + XSAVE(xsave_buf0, SAVE_MASK); + dump_buffer(xsave_buf0, xsave_size); + ksft_print_msg("Entire contents of XSAVE is as above\n"); +} + +static void test_xsave_ymm_change(int xsave_size) +{ + const char *test_name = "xsave test after ymm change"; + uint32_t ui32_set = 0x1234, ui32_change = 0x5678; + int result = RESULT_ERROR; + + set_ymm0_reg(ui32_set); + XSAVE(xsave_buf0, SAVE_MASK); + set_ymm0_reg(ui32_change); + XSAVE(xsave_buf1, SAVE_MASK); + result = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, test_name, + CHANGE); + check_result(result, test_name); +} + +static void test_xsave_xrstor(int xsave_size) +{ + const char *test_name = "xsave after xrstor test"; + int result = RESULT_ERROR; + + XSAVE(xsave_buf0, SAVE_MASK); + XRSTOR(xsave_buf0, SAVE_MASK); + XSAVE(xsave_buf1, SAVE_MASK); + result = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, test_name, + NO_CHANGE); + check_result(result, test_name); +} + +int main(void) +{ + int xsave_size; + + ksft_print_header(); + ksft_set_plan(2); + + xsave_size = get_xsave_size(); + /* SDM XSAVE: misalignment to a 64-byte boundary will result in #GP */ + xsave_buf0 = aligned_alloc(64, xsave_size); + if (!xsave_buf0) + execution_failed("aligned_alloc xsave_buf0 failed\n"); + xsave_buf1 = aligned_alloc(64, xsave_size); + if (!xsave_buf1) + execution_failed("aligned_alloc xsave_buf1 failed\n"); + + populate_fpu_regs(); + /* Show the entire contents of xsave for issue debug */ + dump_xsave_content(xsave_size); + + test_xsave_ymm_change(xsave_size); + test_xsave_xrstor(xsave_size); + + ksft_exit(!ksft_get_fail_cnt()); +} From patchwork Mon Aug 2 04:00:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pengfei Xu X-Patchwork-Id: 491202 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82412C4320A for ; Mon, 2 Aug 2021 04:01:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5996E610A8 for ; Mon, 2 Aug 2021 04:01:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231441AbhHBEBL (ORCPT ); Mon, 2 Aug 2021 00:01:11 -0400 Received: from mga17.intel.com ([192.55.52.151]:8832 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231410AbhHBEBK (ORCPT ); Mon, 2 Aug 2021 00:01:10 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10063"; a="193660645" X-IronPort-AV: E=Sophos;i="5.84,287,1620716400"; d="scan'208";a="193660645" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Aug 2021 21:01:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,287,1620716400"; d="scan'208";a="668971411" Received: from fedora29.sh.intel.com ([10.239.182.87]) by fmsmga005.fm.intel.com with ESMTP; 01 Aug 2021 21:00:59 -0700 From: Pengfei Xu To: Shuah Khan , linux-kselftest , linux-kernel Cc: Pengfei Xu , Heng Su , Yu Yu-cheng , Yu Fenghua , Hansen Dave , Luck Tony , Mehta Sohil , Chen Yu C Subject: [RFC PATCH v2 2/2] selftests/xsave: add xsave test during and after signal handling Date: Mon, 2 Aug 2021 12:00:04 +0800 Message-Id: <672a1d26af50d7413d0cb02eb1685878ede0a535.1627457824.git.pengfei.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org In order to ensure that process XSAVE content is not affected by signal handling, this case tests process XSAVE content should not change in nested signal handling, and the XSAVE content should same before and after signal handling. Signed-off-by: Pengfei Xu --- tools/testing/selftests/xsave/.gitignore | 1 + tools/testing/selftests/xsave/Makefile | 2 +- .../selftests/xsave/xsave_signal_handle.c | 184 ++++++++++++++++++ 3 files changed, 186 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/xsave/xsave_signal_handle.c diff --git a/tools/testing/selftests/xsave/.gitignore b/tools/testing/selftests/xsave/.gitignore index 00b9970360c4..b448d36186f3 100644 --- a/tools/testing/selftests/xsave/.gitignore +++ b/tools/testing/selftests/xsave/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only xsave_instruction +xsave_signal_handle diff --git a/tools/testing/selftests/xsave/Makefile b/tools/testing/selftests/xsave/Makefile index dafdb0abdeb3..fedae2778297 100644 --- a/tools/testing/selftests/xsave/Makefile +++ b/tools/testing/selftests/xsave/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS := -g -Wall -mxsave -O2 -TEST_GEN_PROGS := xsave_instruction +TEST_GEN_PROGS := xsave_instruction xsave_signal_handle include ../lib.mk diff --git a/tools/testing/selftests/xsave/xsave_signal_handle.c b/tools/testing/selftests/xsave/xsave_signal_handle.c new file mode 100644 index 000000000000..0afcba3a1bd5 --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_signal_handle.c @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * It's for xsave/xrstor during signal handling tests + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" +#include "xsave_common.h" + +static unsigned char *xsave_buf0, *xsave_buf1, *xsave_buf2, *xsave_buf3; +static int result[2]; + +static void change_fpu_content(uint32_t ui32_random, double flt) +{ + asm volatile ("fldl %0" : : "m" (flt)); + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm1" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm2" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm3" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm4" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm5" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm6" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm7" : : "m" (ui32_random)); + #ifndef __i386__ + asm volatile ("vbroadcastss %0, %%ymm8" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm9" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm10" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm11" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm12" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm13" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm14" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm15" : : "m" (ui32_random)); + #endif +} + +static void usr1_handler(int signum, siginfo_t *info, void *__ctxp) +{ + uint32_t ui32_random; + double flt; + int xsave_size; + const char *test_name = "Child XSAVE should not change in nested signal"; + + ui32_random = rand(); + flt = ui32_random/10000.0; + if (signum == SIGUSR1) { + ksft_print_msg("SIGUSR1:0x%x changed fld:%f & ymm0-15:0x%x\n", + SIGUSR1, flt, ui32_random); + change_fpu_content(ui32_random, flt); + } + xsave_size = get_xsave_size(); + XSAVE(xsave_buf2, SAVE_MASK); + raise(SIGUSR2); + XSAVE(xsave_buf3, SAVE_MASK); + result[0] = check_xsave_buf(xsave_buf2, xsave_buf2, xsave_size, test_name, + NO_CHANGE); +} + +static void usr2_handler(int signum, siginfo_t *info, void *__ctxp) +{ + uint32_t ui32_random; + double flt; + + ui32_random = rand(); + flt = ui32_random/10000.0; + if (signum == SIGUSR2) { + ksft_print_msg("SIGUSR2:0x%x changed fld:%f & ymm0-15:0x%x\n", + SIGUSR2, flt, ui32_random); + change_fpu_content(ui32_random, flt); + } +} + +static void set_signal_handle(void) +{ + struct sigaction sigact; + + memset(&sigact, 0, sizeof(sigact)); + if (sigemptyset(&sigact.sa_mask)) + execution_failed("FAIL: sigemptyset error\n"); + + sigact.sa_flags = SA_SIGINFO; + + sigact.sa_sigaction = usr1_handler; + if (sigaction(SIGUSR1, &sigact, NULL)) + execution_failed("FAIL: SIGUSR1 handling failed\n"); + + sigact.sa_sigaction = usr2_handler; + if (sigaction(SIGUSR2, &sigact, NULL)) + execution_failed("FAIL: SIGUSR2 handling failed\n"); +} + +static void sig_handle_xsave_test(void) +{ + int i, loop_times = 100, xsave_size; + const char *sig_test_name0 = "Child XSAVE was same in nested signal test"; + const char *sig_test_name1 = "Child XSAVE content was same after signal"; + + xsave_size = get_xsave_size(); + /* SDM XSAVE: misalignment to a 64-byte boundary will result in #GP */ + xsave_buf0 = aligned_alloc(64, xsave_size); + if (!xsave_buf0) + execution_failed("aligned_alloc xsave_buf0 failed\n"); + xsave_buf1 = aligned_alloc(64, xsave_size); + if (!xsave_buf1) + execution_failed("aligned_alloc xsave_buf1 failed\n"); + xsave_buf2 = aligned_alloc(64, xsave_size); + if (!xsave_buf2) + execution_failed("aligned_alloc xsave_buf2 failed\n"); + xsave_buf3 = aligned_alloc(64, xsave_size); + if (!xsave_buf3) + execution_failed("aligned_alloc xsave_buf3 failed\n"); + + srand(time(NULL)); + result[0] = RESULT_PASS; + result[1] = RESULT_PASS; + + XSAVE(xsave_buf0, SAVE_MASK); + for (i = 1; i <= loop_times; i++) { + raise(SIGUSR1); + XSAVE(xsave_buf1, SAVE_MASK); + result[1] = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, + sig_test_name1, NO_CHANGE); + if (result[1] != RESULT_PASS) + break; + } + + check_result(result[0], sig_test_name0); + check_result(result[1], sig_test_name1); +} + +static void test_xsave_sig_handle(void) +{ + const char *test_name0 = "xsave in child nested signal handling test"; + const char *test_name1 = "xsave after child signal handling test"; + pid_t child; + int status, fd[2], readbuf[2]; + + set_signal_handle(); + + /* Use pipe to transfer test result of child process to parent process */ + if (pipe(fd) < 0) + execution_failed("FAIL: create pipe failed\n"); + + /* Use child process testing to avoid abnormal blocking the next test */ + child = fork(); + if (child < 0) + execution_failed("FAIL: create child pid failed\n"); + else if (child == 0) { + populate_fpu_regs(); + sig_handle_xsave_test(); + close(fd[0]); + write(fd[1], &result, sizeof(result)); + } else { + if (waitpid(child, &status, 0) != child || + !WIFEXITED(status)) + execution_failed("FAIL: Child died unexpectedly\n"); + else { + close(fd[1]); + read(fd[0], &readbuf, sizeof(readbuf)); + + check_result(readbuf[0], test_name0); + check_result(readbuf[1], test_name1); + } + } +} + +int main(void) +{ + ksft_print_header(); + ksft_set_plan(2); + + test_xsave_sig_handle(); + + ksft_exit(!ksft_get_fail_cnt()); +}